#include <stdio.h>
#include <assert.h>

int any_odd_one(unsigned x){
    return (0x55555555 & x) != 0;
}

int main(){

    assert(any_odd_one(0x55555555));
    assert(any_odd_one(0x1AAAAAAA));
    assert(!any_odd_one(0xAAAAAAAA));

    return 0;
}